Valve-gear.



Patented June 4, 1912.l

LJ. MYERS. VALVE GEAR.

APPLICATION I'ILD MAR. Z, 1911.

\ www COLUMBIA PLANDIRAPM co.,vlAsH|NnTON. D. c.

UNTED STATES `PATENT QFFCE.

ELMER J. MYERS, OF MARTINSBURG, PENNSYLVANIA, ASSIGNOR 0F ONE-HALF v.'IO CHARLES F. BROWN, 0F HOLLIDAYSB'URG, PENNSYLVANIA.'

VALVE-GEAR.

To all whom t may concern Be it known that I, ELMER J. MYERS, a citizen of the United States, residing at Martinsburg, in the county of Blair and State of Pennsylvania, have invented certain new and useful Improvements in Valve- G-ear, of which the following is a specification.

The present invention relates to certain new and useful improvements in valve gear for steam engines, and has for its object to provide a valve gear which is comparatively simple and inexpensive in its construction, which is positive and reliable in operation, and in which all of the parts are readily accessible for oiling or repairing.

A further object of the invention is the provision of a valve gear which embodies novel features of 4constructio-n whereby the vibratory movement ofthe pitman is utilized to control the admission and exhaust of steam from the cylinder, and which admits of the engine being readily reversed and the amplitude of movement of the valve in the valve chest regulated as required. l

With these and many other objects in view which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangements of the parts hereinafter more fully described, illustrated, and claimed.

The essential features of the invention involved in carrying out 'the objects above specified are necessarily susceptible to a wide range of Vstructural modificati-on without departing from the scope of the invention, but a preferred embodiment thereof is shown in the accompanying drawings, in which Figure 1 is a top plan view of a stationary engine having the improved valve gear applied thereto. Fig. 2 is a side elevation of the'same. Fig. 3 is a detail view showing a modification in which the valve rod moves horizontally instead of vertically, as sho-wn in Figs. 1 and 2.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The improved valve gear maybe applied to an engine of any suitable type, although in the present instance it is shown, for the purpose of illustration, as applied t0 a sta- Speccation of Letters Patent.

v Application filed March 2, 1911.

Patented J une 4, 1912.

serial No. 611,895.

tionary engine in which the cylinder is horizontally disposed. This engine may be of any approved construct-ion, and includes a bed 10 -upon one end of which the cylinder 11 is mounted, the said cylinder being provided with the usual piston which is arranged to reciprocate back and forththerein and is connected to a piston rod 12. The' free end of this piston rod 12 is secured to a cross head 13 which slides upon the guides 14 and is connected by a pitman 15 to a crank 16 at one end of a shaft 17, the said shaft being journaled in the bearings 18 and provided with a fly wheel 19.` The admission of steam to the cylinder and exhaust .of steam therefrom is controlled by means of a suitable reciprocating valve operating within a valve chest 20, the said valve being connected lto a valve stem 21 which projects through the steam chest and terminates in a head 22 having a slot 23 formed therein.

The pitman 15 is provided with a longitudinally disposed rib 24, the said rib being shown in the present instance as constituted by one of the flanges of an angle iron '25 which is rigidly secured to the pitman in some suitable manner as by -means of the fastening members 26. A bifurcated block or slide 27 engages the rib 24, and this block is shown as provided with a rearwardly projecting stem 28 which is loosely received within an opening in the free end of a 'lever 30. A nut 31 is applied to the extremity of the stem 28 to hold the lever 30 in engagement therewith, and the said lever is formed with a centrally disposed oifset portion 30a whereby the two ends of the lever are caused to be disposed vin spaced and parallel planes. One end of the lever is, as previously described, pivotally connected to the block 27, while the opposite end of the lever is pivotally connected at to a bracket 33 project-ing from the bed of the engine. With this construction, it will be apparent that when the engine is in operation the rib 24 will slide back and forth in the block 271and will also cause the lever 30 to be oscillated as the pitman is vibrated upV and down.

A slotted arm 34 projects from the offset portion 3.0a of the lever 30 and is spaced from and parallel to the pivot end of the said lever. This slottedv arm 34 loosely receives a pivot pin 35 carried by one end of .a main lever 36, the said main lever beside of the pivot of the first mentioned lever by a longitudinal movement of the second mentioned lever, a slotted support adjustably receiving the pivot of the second mentioned lever whereby the said second mentioned lever can be moved back and forth to regulate the amplitude of movement thereof or reverse the direction of movement thereof, a slotted head applied to the valve stem, and a pin upon the opposite end of the second lever adjustably engaged by the said slotted head.

6. A valve gear for steam engines, including a longitudinal rib upon the pitman of the engine, a lever, a block carried by the free end of the lever and engaging the rib upon the pitman whereby a vibratory motion is imparted to the lever, a slotted arm projecting from the lever, a second lever capable of lateral adjustment, a pivot pin mounted thereon, said second lever having one end thereof connected to the arm by said pivot pin which is slidable within the slot so as to be shifted to either side of the pivot of the first mentioned lever, a slotted support upon which the pivot of the second mentioned lever is adjustably mounted to admit of the said second mentioned lever being shifted back and forth to regulate the amplitude of movement thereof or reverse the direction of movement thereof, a slotted head applied to the valve stem, and a pin at the free end of the second lever loosely engagedV by the said slotted ead.

In testimony whereof I hereunto affxmy signature in the presence of two wit- Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, f

Washington, D. C. 

